Freightliner's Class 57 0s might look like class 47s but they don't sound like them! They have been re-engined with a GM.
They are a small class totalling just 12 this being the last 57012 'Freightliner Envoy'
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Photo from James & Martin's Picture Collection Copyright 'Jampics' m.hawkes7@ntlworld.com 
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British and Foreign Railway Pictures <A HREF="http://jampics.fotopic.net/"> Jampics Fotopic.</a>